Device for operating valves on steam-boilers



(No haai.)

wQsToRB. ADevice for Operating Valves on steauf'oi'lers.

No. 236,645-j` 'Pafenfedanifg 1145118811. l*

v UNIYT`ED STATES PATENT OFFICE.

GEORGE w. sToEEE, or PHILADELPHIA, PEsssYLvANtA.

DEVICE FOR OPERATING VALVES oN STEAM-Bomans.

SPECIF1CATION forming part of Lettersilatent No. 236,645, January 11, 1881. Application inea october wieso. (No moda.)-

To all 'whom it may concern: f

Be it known that I, GEORGENY. S'roREr., a citizen ot' the United States, residing lin Philadelphia, Pennsylvania, have'invented an Improvement in Devices for Operating Yalveson Steanroilcrs, 'c., of which the following,r is a specification.

The object of my invention is to provide simple and e'ective means for governing the operation of a pressare-actuated valve connected with a vessel orreservoir containing steam, air, gas. or liquid under pressure, and this object l attain Ain 'the manner hereinafter set forth, reference being had to the accompanying drawings, in which- Figure 1 is a diagram illustrating my invention in connection with the safety-valve of a steam'boiler; Figs... and 3, seetionalviews, on an enlarged scale, ot' valves used in carry ing out my invention.

A represents part of a steanrboiler, and B a. valve-casing, the interior ot' which communicates with the steam-space ot' the boiler through a suitable branch, u. The casing B has-two other branches, b and d, the branch b iorniing the discharge branch,'and beingclosed under ordinary circtnustanccs by the valve e, the stem of which is furnished with a piston, f, branch heilig bored out t'or the reception ot' the piston, which tits so loosely therein, or is provided with such grooves or openings, that steam can pass through or around the piston, so as to act on both faces ot' the same. The area ofthe inner face ofthe piston is slightly' greater than the etl'ective area ot' the valve e exposed to the pressure ot the steam; hence when the steam is allowed to escape from' the branch d ot' the chesti'aster than it can pass through or around the piston fthe pressure on the outer i'aee ot' the same is reduced, and

the pressure on the inner face of the piston overcomes the pressure on the valve o, the lat- -ter being thereby opened, so as to permit the escape ot' steam from the branch I, which is -preferably furnished with a pipe having a -s cam-whistle, so thatthe escape of steam will fc I' se the sounding ot`yan alarm or signal. NVhe'n the escape ot' steam from the branch l fof the casing A is cut; oft', however, the pressnre exerted on the outer face of tho piston l fitting in the branch `d'ot' the. chest, said is sutiicient to effect the closing of 4the valve e, and thus stop thel flow ot' steam through thedischarge branch b. I

An automatic discharge-valve of this eharacter has been heretofore. devised, and my present invention relates to the means ot' controlling the operation of the. valve by regulating the escape of steam from the branch d of the valvecasin". Cates through a pipe, g, with the interior of a valve-chest, 1),` to the. 4discharge branch of which is adapted a valve, i, the pressure on which should be balanced as nearly as possible by pressure in the opposite direction, so thatthc opening of the valve can be effected with but little exertion. In the present instance the balancing of the valve is effected by the pressure ot' steam ou an annular flange on the valve-stem; but this construction is not: essential, as many of the common forms 0l balanced valves maybe used in place'ot' that'. shown, if desired.

Said branch I communi- The stem 'm of the valve Ai is adapt-ed t0 a bearing in the ehestD and projects through a' cap, E, on said casing, said cap containing a spring, n, which acts upon a collar on the valve-stein `and serves to keep the valve t' in its seat under ordinary circumstances and prevent the accidental opening of said valve.

The outer end of the. valve-stem m is provided with a transverse bar, p, which forms the armature ot' an electro-magnet, J, ot' which .r

ijs, the positive and y the negative wire. The

positive wire .r terminates at any desired point on the dial of a pressure-gage,-P. Itv may,'t`or instance, terminate at thel graduation repre seating the pressure at' which it isdesirable to open the safety valve ot the boiler A, with which the pressure-gage shouldI communicate. The wire .r is, ofcourse, insulated from the dial,

or the latter may be made of non-conducting material. The negative wire lea-ds from the magnet J to the: negative pole of the battery S, the positive pole ot' which is connected with. the pointerot` thc pressant-gage. Aslong as the pressure in the boiler A does not reach the.

height indicated bythe graduation att-which the wire tr terminates the circuit through the magnet will not be completed and 'the armature p will not be attracted, the valve i eo-nseqnently remaining closed, and thus prevent IOO t through the magnet J-a result ingthe escape of steam from the branch d of the valve-chest 13, the valve e of which must therefore also remain closed. 'heu the'pointer of thc gage has. moved so far,` ho\vever,' as tc complete the circuit through said pointer and thewirc- .1','th'e armature of the magnet will be attracted and the valve i opened, thereby permitting the escape ot' steam from the branch d of the chest 1S and the opening of the valve e to its i'ull extent, so as to permit the free escape oi' steam from vthe. boiler A, suchV escape continuing until the pressure is so i'ar reducedthat the pointer of the gage I moves away from the wire .rand again breaks the circ-uit: followed by the immediateclosing ofthe valves Ai and e.

The circuit may be completed independently ot' the gage l by means of the switch s and tv iie s when it is desired to test the working of the valve c or to sound the alarm onsigual connected therewith.

Although I have shown my invention iu counection with a steain-boiier, it may bc used in connection with reservoirs containing air, gas, or liquid limiet' pressurer or the valve e maybe used to control the flow' ot' steam, air, gas, or liquid ,under pressure through pipes or passages, in which case the circuit through the magnet .l may be closed or broken by means ot' thc switch s, or a suitable knob or button in place thereof, the automatic making and breaking ot' the circuit through the medium oi the pressurc-gage vnot being'essential in such case; or, when the pressure-gage is used, it may be caused to govern the admission ot Steam, tvc., into a vessel, instead ot' regulating the discharge therefrom, the gage in this case operating to permit: the opening of the' valve and the admission oi' steam into the vessel when the pressurein the latter falls below a certain point, as ivill'be readily understood.

I claim asmy inventionj. The combination of a vessel or lreservoir' containingsteam,air,gas,orliqniduntler'pressure, an inlet or discharge valve connected therewith and actuated by pressure, a suppleinentary valve governing said; pressure-actuated valve, an electro-magnet for operating said supplementary valve, and means for making and breaking the circuit through said electro-magnet, as set forth.'

2. The combination ot a reservoir otsteam. air, gas, or liquid under pressure, a pressureactuated valve connected therewith, a supplementary valve governing said pressure-actua-ted valve,4 an electro-magnet for operating said snpplemen tary valve, and a pressure-gage constructed to make and break. the circuit through saidelectro-magnet. as specified.

3.- '.lhc con: ation ott he reservoir, the pressure-actuated valve, the supplementary govern'iug-valve, the electromagnet for operating said' supplementary valve, the pressure-gage 'constructedl to make and break the circuit through the electro-magnet. and a su'itcliwhereby the circuit may be controlled independently of the pressuregage, as described.'

In testimony whereotl havesign'ed iny naine to this spceiticatiou in the presenoeof two sub-` scribing witnesses.

GEORGE I STORER.

Witnesses .Lures F. Toms, HARRY Smrn. 

